Index: Source/core/streams/ReadableStream.idl |
diff --git a/Source/core/streams/ReadableStream.idl b/Source/core/streams/ReadableStream.idl |
index 5d4a76e1e20fb4c2beae6eb50582c89200019bab..e97eaa49e4ea4cdc9a504a7136782d8a2b05aefd 100644 |
--- a/Source/core/streams/ReadableStream.idl |
+++ b/Source/core/streams/ReadableStream.idl |
@@ -9,5 +9,5 @@ |
ActiveDOMObject, |
] interface ReadableStream { |
[RaisesException] ReadableStreamReader getReader(); |
- [CallWith=ScriptState] Promise<void> cancel(any reason); |
+ [CallWith=ScriptState] Promise<void> cancel(optional any reason); |
}; |